commit e4dbb0f2b5dd6a836d0e5c60aa5f573e0bbcf76a
author Stefan Haberland <stefan.haberland@de.ibm.com> Wed Jan 05 12:48:06 2011 +0100
committer Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> Wed Jan 05 12:47:30 2011 +0100
tree cb18d0b08f2ccc8d6a078456b77f111805777db8
parent 6f272b9cec285a9610a2acf101f694bc58bed37e

[S390] dasd: Add support for raw ECKD access.

Normal I/O operations through the DASD device driver give only access
to the data fields of an ECKD device even for track based I/O.
This patch extends the DASD device driver to give access to whole
ECKD tracks including count, key and data fields.

Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/include/asm/dasd.h

diff --git a/arch/s390/include/asm/dasd.h b/arch/s390/include/asm/dasd.h
index 47fcdad..0be28ef 100644
--- a/arch/s390/include/asm/dasd.h
+++ b/arch/s390/include/asm/dasd.h
@@ -73,6 +73,7 @@
  * 0x02: use diag discipline (diag)
  * 0x04: set the device initially online (internal use only)
  * 0x08: enable ERP related logging
+ * 0x20: give access to raw eckd data
  */
 #define DASD_FEATURE_DEFAULT	     0x00
 #define DASD_FEATURE_READONLY	     0x01
@@ -81,6 +82,7 @@
 #define DASD_FEATURE_ERPLOG	     0x08
 #define DASD_FEATURE_FAILFAST	     0x10
 #define DASD_FEATURE_FAILONSLCK      0x20
+#define DASD_FEATURE_USERAW	     0x40
 
 #define DASD_PARTN_BITS 2